The diagram below shows four coastline locations on earth with respect to the moon and sun at a given time. earth is shown as a circle with a smaller circle labeled moon to the right of it and a larger semicircle labeled sun to the right of that. points w and y are marked at the top and bottom ends of the circle representing earth. points x and z are marked at the left and right sides of the circle representing earth. in this current position, which coastline(s) are experiencing the high spring tides? both w and y both x and z only w only x

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.